The Grey Afternoon: A Sensible Look at Botanicals for Winter Low Mood

There is a particular kind of UK afternoon in November that seems to arrive already tired. The sky is the colour of a dishcloth, the heating clicks on at four, and by five you are wondering whether you have it in you to chop an onion. If your mood dips with the light, you are not imagining it, and you are certainly not alone.

It is also completely understandable that people start looking for something gentle to take the edge off. A herbal tea, a tincture, a capsule from the health shop — something plant-based and soft-edged. This is where a little honesty helps. Botanicals can be lovely companions through winter, but they are not a lamp. They will not replace daylight, sleep, movement, routine or proper medical care when those things are needed.

First, What Winter Low Mood Is and Isn’t

Feeling flatter, sleeper and less motivated as the days shorten is common. For some people it is a mild seasonal slump; for others it is seasonal affective disorder, or SAD, which is a recognised form of depression with a seasonal pattern. The NHS describes SAD as low mood and other symptoms that recur at the same time each year, usually in winter.

The difference matters because the response should match the problem. A pleasant chamomile tea is not a treatment for moderate or severe depression. It is a small ritual that might help you pause. That is worth having, but it is not the same as evidence-based care.

What Herbs Can Reasonably Offer

Herbal remedies are best seen as supporting players. Some may help with sleep, stress or the general feeling of being wound up, and better sleep and lower stress can make a grey week easier to bear. Others have evidence in specific conditions, but that evidence does not automatically stretch to winter low mood.

This is the key distinction: a botanical might have decent evidence for mild to moderate depression in general, or for anxiety, or for sleep quality, without having been studied specifically in seasonal low mood. That does not make it useless. It does mean we should avoid turning a general finding into a very specific promise.

St John’s Wort: The Evidence and the Elephant in the Room

St John’s wort is the botanical most people land on when they search for herbal help with low mood. It has been studied fairly extensively for mild to moderate depression, and some trials and reviews suggest it can be more effective than placebo for some people. That is more than can be said for many herbs.

But there are two large caveats. First, the evidence is not specifically about winter low mood or SAD. Second, and far more importantly, St John’s wort is a notorious interactor with other medicines. It affects enzymes and transporters in the body, including CYP3A4 and P-glycoprotein, which can change how other drugs are absorbed and broken down.

That matters for a long list of medicines, including some antidepressants, warfarin, combined hormonal contraceptives, ciclosporin and other immunosuppressants, some HIV medicines, digoxin, and certain migraine treatments. Taking it alongside a serotonergic antidepressant can raise the risk of serotonin syndrome. It can also cause photosensitivity in some people, which is a real consideration if you are already chasing winter light.

None of this means St John’s wort is evil. It means it is a real medicine with real interactions, not a harmless tea. If you are on any prescription medicine, ask a pharmacist or your GP before taking it. Do not stop or change prescribed antidepressants in order to try a herb. And if you are already taking St John’s wort, tell your prescriber — even if it feels like a small thing.

Other Botanicals Worth a Cautious Look

Lemon balm, chamomile and lavender are often reached for when the evenings feel long and the mind feels busy. The evidence is modest and mixed, particularly for mood itself, but some people find them helpful for relaxation or sleep. Used as a tea or a gentle aromatherapy blend, they are generally low-risk for most adults, though allergies and sensitivity can happen.

Saffron has attracted interest in depression research, with some small trials showing promise. Rhodiola and other adaptogens turn up in winter wellbeing blends too. The honest summary is that the evidence is early or uneven, product quality varies, and none of these should be positioned as a substitute for light therapy, talking therapy or medical treatment if your symptoms are significant.

If you do try something, choose a reputable UK supplier, follow the label, and keep a simple note of what you are taking and how you feel. Registered traditional herbal medicines carry a THR mark, which at least confirms a level of quality and traditional use assessment. It is not a guarantee of effectiveness.

Light, Sleep and Routine Do More Heavy Lifting

For seasonal low mood, the unglamorous basics still matter most. Get outside in the morning if you can, even when it is grey. The light outdoors is still brighter than most indoor lighting. Keep regular sleep and wake times. Eat something decent at lunchtime. Move your body in a way you do not hate. Protect small pockets of connection with people who make you feel less alone.

Light therapy lamps are used for SAD, typically around 10,000 lux for about 30 minutes in the morning, but it is worth reading NHS guidance and checking with a clinician if you are unsure. Some people with certain eye conditions or medications that cause photosensitivity should be cautious. A lamp is not the same as a herbal tea, and that is rather the point.

When to Seek Proper Help

If low mood is lasting for weeks, affecting your work or relationships, or bringing feelings of hopelessness, worthlessness or thoughts of self-harm, please speak to your GP. NHS talking therapies are available without a referral in many areas, and urgent support is available if you need it. In the UK, Samaritans can be contacted free on 116 123, day or night.

A herbal tea can sit alongside that help. It cannot do the job of it. Think of botanicals as a lamp on a side table — a small, warm point of comfort in a grey afternoon — rather than the daylight itself.